J-Fet's 2SK170 & 2SJ74 question - John Curl ?

I'm asking on behalf of my father, if there's any other J-Fet's you can recommend to be used with RIAA stages. We've browsed thru every manufacturers web sites, and before mentioned J-Fet's seem to be the only ones suitable. My father has always used bipolars in his designs, and his experience with J-Fet's is limited, but that seems to be the way to go with pre-amp stages. Thank you in advance for any information.

MCM has 2SK170/2SK389/2SJ74/2SJ109. Some of these are back ordered (I ordered all of their K389's!). I don't know what grade these will be, have to wait till they show up. My K389/J74's should be here any day, the K170's early April. Borbely Audio also sells these parts. RonS